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A fourth equation can be useful when acceleration is known to be constant, but its value is unknown. This equation can be derived by combining two equations for average velocity.
Instantaneous speed is the magnitude of instantaneous velocity. For example, suppose the airplane passenger at one instant had an instantaneous velocity of − 3.0 m s , the negative meaning toward the rear of the plane.
Math: Get ready courses; Get ready for 3rd grade; Get ready for 4th grade; Get ready for 5th grade; Get ready for 6th grade; Get ready for 7th grade; Get ready for 8th grade
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Learn about torque, its definition, formula, and examples with Khan Academy's comprehensive physics tutorial.
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Understand the formulas for observed frequency when the source is moving towards or away from the observer. Apply these concepts to real-world scenarios like the changing pitch of a moving train's horn.
In this unit, the videos taught that anything travelling with uniform speed has a constant acceleration, or change in velocity because the direction is changing, and that the formula is A(c)=v^2/r. But if the speed is constant, only direction is changing, why would it have any acceleration magnitude?
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